Nut-lock.



10.827,198. y ATBNTBDJULY 31,` 1906.

- B. WATTS.

NUT LOCK.

APPLICATION FILEDDEG. 18. 1905.

. 'ERYAWVATTS- i 15H/m5.'

,I v"provide a simple .and effective: nut-lock so constructed `and arrangedl ,that the parts l maybe quickly and cheaply'4 assembled Withoutthe use of' bolts, screws, rivets`,.or pins UNITED sTATEs To all whom it may con/cern.-

Be it known that BRYANT WATTS, a citizen yofthe United States, residing als-Springliield, in the county of Sangamon and State of Illinois,- haveinvented certain new and usefull Improvements in Nut-Locks, of which '1 the following is. sucha full, clear, and exact description as will enable others skilled 'in' Athe Vart to' whichit appertains to make and lovv use my said invention. r

-My'nvention relates to nut-locks of'that class in which a locking device on the nut engages-with'a stop" or stops on the bolt to .pre-

`2o 1 hammer,.reducing to the vminimum the cost' vent unscrewing 'of the nut. 2 lThe generalpurpose of this invention is t6' and" without' the use of tools other than a oi production and obviatingthe inconvenience and `loss -resultingfrom the .displacetransverse movement; to provi e a pawl ofy ment and breakage of parts ofrthe nut-lock, and s o/constru'cted and arranged that vthe retaining spri'n'g or pawl may be raised lwhen it `is desired to remove the n'ut.I

The more -lspeeiiic purposes of my invention `are to provide a nut of improved form,

adapted to house la resilient pawl or finger acting on the bolt' with which the nut is used; to provide in the body of the nuta` pawl-housing adapted to prevent longitudinal movementvof the pawl, also adapted to firmly hold theI basalA part of the awl against i improved form iit'ti'ng in the housingof the nut; to provide a pawl-securing device integral with the body ofthe nut and :adapted to secure the pawl in the nut without the use of extraneous securing devices, suchv as ins,

rivets, screws',&c., and to provide a nut aving a'transverse opening extending through several views, Figure 1 l is a top p an of `a bolt Specflclatipn of Letters Patent. v Application filed December 18., 1905. Serial No. 292.1814.

PATENT oEFoE.

BRYANT wA'TTs, `-or SPRINGFIELD, iLniNois.

NUT-LOCK.

Patented Jury 31, 1906.

and nut embodying my improvements. Fig. 2 is an enlarged transverse section fon the line 2 2 of Fig-'1.'. Fig.. 8 is an enlarged partial section on the line 3 3 of Fig. 2. an enlar ed partial section through the nut and paw and shows the position of the ears on the nut before being turned inward to bear against the face of the pawl. elevation 'of the device. Fig. 6 is .a partial vertical section on the line 6 6 of Fig. 5, and Fig. 7 is an enlarged isometric projection of the spring. 'v

The bolt Alias screw-threads a matching the threads of the nut and grooves constructed and arranged to-form a series of abrupt stops a lengthwise ofthe bolt, against which the free end of the pawl strikes to prevent unscrewing of the nut. s

l The nut' B has screw-threads?) matching the .threads of. the bolt. v Formed'inv the metal of the nut and extending transversely through the nut is a depression b', formed to accommodate the pawl B and permit vibration of the free end thereof, and a dovetail depression b2, extending part .way throu h the nutin which the basal part b3 of t e pawl .fits tightly. lOn'each side of and parallel to the depression b2 isa relatively shal- Fig. 4 is Fig. 5-is an end V loW depression b5, separated `Jfrom the depression b2 by thin walls b4 of the metal of the` nut.' The walls b4 are. far enough apart `.to

permit the spring B to pass between the' walls when the spring is being inserted in the depression b2. After the base `of the spring B has been placed in the depression the walls b4 are bent by pressing or hammering ,them to cause the Walls to project overA and bear against the outer surface of the spring, as f shown in Figs. 2 and 3.' When the'parts'are inthi's position, the expanded parts of the walls bear on the springl and hold itiirmly in the depression.` The sprin isv depressed somewhat below the adjacent ace of the nut, so that it will not interfere with or'prevent the bearing ofthe face of the nut against the Washer B2, used'with the nut, lor against vthe structure with which the nut is used. i n

The sprin B tapers, substantially, as shown and as a dovetail part. b3 fitting IOO tightly in the; depression 52, which prevents longitudinal movement of the spring. i rl`he sprlng yields to permit its free end to travel around on the surface of the bolt, andthe end of the spring -enters the groovesga and prevents unscreWin of the nut. One eorner of the free end of t e spring B is out away to form a beveled part t, Which rides on the curved surface a of. the end of the bolt dur,- ing the placing of the nut on the bolt. The end of the spring is beveled sufficiently to permit at least one thread of the nut to take with av thread of the screw, so that the longitudinal movement of the nut on the bolt, caused by turning the nut,vW.ill slide the part be on the part a2, and thereby raise the spring, so that during the continued onward turning ot the nut the end of the spring will travel around the bolt on the threads e of the bolt, and if the-direction of turning the nut be reversed the end of the spring will enter the nearest groove a and prevent further back- .Ward turning of the nut. When the mit ",.is l screwed tightly against the Waslrier, the

spring is situated.

Washer covers the depression in which the W'hen the end of the springis in any one of the grooves, the centralline of the spring is approximately tanent to the circumference of the bolt and oroe applied in the direction necessary to unscrew the nut Will cause the end of' the spring to press against the abrupt Wall oi" the he pressure on the spring' being in the nature ofend thrust, as distinguished' from transverse stress, a comparatively light spring may be used Without impairing the effectiveness ol the nut-lock. When it is desired to remove the nut, the point oie screwdriver or other suitable flat instrumentl will be inserted in the opening t" between the spring B and the bolt A., and by turning the instrument the spring will be raised to lift its free endout of the notches, so to permit unscrewing of the nut.

roove in which the end of' the spring lies.

Having fully described my invention, what l olaim as new, and-desire to secure by Letters Patent, is

l The combination of a screw-threaded bolt having longitudinal grooves and an inclined end, a screw-threaded nut fitting .lon said bolt sind having a depression adapted to hold a pawl against longitudinal movement, and adapted to permit vibration of' the free end of the pawl, and having expansible walls contiguous to said depression, and a pawl adapted to enter the grooves in the bolt and tting in said depression in the nut and, secured therein by the expanded walls of the nuit/seid. paw] also havingv an inclined part riding on the inclined part. of said bolt to raise the pe-wl.

2. A nut havin a main depression extending transversely tirough the nut and accommodating a vibrating pawl usable with the nut and adapted to coperate with the bolt upon which the nut is threaded, said depression being also adapted to accommodate an instrument adapted to raise the pawl, said nut also having a dovetailed depression adapted to accommodate the fixed end of the pawl, a lateral depression contiguous to the dovetsiled depression and walls contiguous to the dovetailed depression and extending into the lateral depression and expansible to partially overlie the dovetailed depression; in combination with a paivl fitting in the dovetailed4 depression.

1n Witness whereof I have hereunto signed my name, at Springfield, Illinois, this 28th day of November, 1905.'

BRYANT WATTS. Witnesses lili/inseam iiioDoNALD, Mer FJAN. 

